Oil burner



mmam

F. REX

OIL BURNER Filed Oct.13. 1923 INVENTOR B D Q w w ATTIORNEY Patented Apr. 19, 1927.

UNITED STATES f N T FRANK 31x, 01 NEW YORK, N. Y., ASSIGNOB OF ONE-HALF TO JOHlFlF. SIEGEL, 0F

' NEW YQRK, N. vY. i

011p BURNER.

Application filed October is, 1923. Serial No. 668,252.

This invention relates to improvements in oil burners.

More particularly it is'di'rected to burners of the character described known as centrifugal burners in which a fluid under pressure, such as compressed air, is employed for rotating the atomizing cup, and which air is mixed with the oil to provide a combustible charge.

One object of the invention is to provide a burner of the character described having improved means permitting a regulation and control of the air supply which. reaches the outlet end of the burner.

Another object is to provide means for exhausting a desired amount of air from the burner before the air supply reaches the outlet end of the burner.

A further object is to provide a burner of the character described with means for throttling and exhausting the air supply from the burner to any desired degree without afiecting the speed of rotation of the atomizing tube or cup propelled by the air pr yr A still further object is to provide a burner of the character described which shall be economical and efficient in operation to a high degree.

Other objects of this invention will in part be obvious and in part hereinafter pointed out.

The invention accordingly consists in the features of construction, combinations of elements and arrangement of parts which will be exemplified in the construction hereinafter described, and of which the scope of application will be indicated in the following claims.

In the accompanying drawin in which is shown one of the various possi le illustrative embodiments of this invention,'-

Fig. 1 is a view in longitudinal section illustrating my improved burner;

Fig. 2 is a view in transverse section on line 22 of Fig. 1;

Fig. 3 is a view in side elevation of the forward end of the burner with the exhaust pipe shown in section; and

Fig. 4 is a view in transverse section on line 44 of Fig.

Referring in detail to the drawing, 1 represents a burner casing of general cylindrical form, having an extension'2 removably secured thereto and in alignment thereand screwed into. an annular flange 5 on the extension-2.

V A tapering air nozzle 6 is adjustably screwed on the forward end of the extension 2' and a cap plate? is secured to the rear end of the casing by screws 8. This cap plate 7 and the end of the casing 1 are recessed to house an antifriction bearing 9 and the extension 2 has a partition recessed to accommodate a similar bearing 10, the last named bearing being removably held in the partition 9 by a threaded ring 11 with suitable packin rings 12 interposed between the ring and trally disposed in the burner casing 1 has a rotary mounting in the bearings 9 and 10, and at its rear end extends through a nipple 15 on which a coupling 16 is located to con nect a supply pipe (not shown). A conical deflector or spreader 17 is screwed onto the forward end of tube 14 and has its enlar d outlet end projected through, and preferably slightly beyond, the end of the nozzle 6. A spray nozzle 18 is screwed into the inner portion of spreader 17 in line with tube 14 and is provided with a plurality of radial ports 19 through which the oil is discharged against the inner face of spreader 1'7, and by reason of the centrifu al action is caused to breakup into fine glo ules or particles and issue as a spray to commingle with the air and give a perfect combustion. A propeller 20, preferably in the form of a worm or screw, is secured on the tube 14 and fits the casing 1 and an air inlet 21 is provided at the rear of the propeller so that the passage of air through the casing causes a rotary motion to be imparted to the propeller and tube 14. An air exhaust pipe 22 communicates with'casing 1, in advance of the propeller, and a throttle valve 23 is provided in this pipe 22 to control the exhaust of air. At the inlet end of extension 2, I provide a pair of semicircular throttle valves 24, 24 to throttle the air as it passes throu h the burner. and I provide openings 25 in t e partition-13 to permit a free passage of air to the nozzle 6. The throttle valves 23 and 24 are manually operated in unison, and I have illustrated for this purpose manually operated means shown most clearly in Fig.

- 3, and which will be described in detail.

stems 3301f throttle valves 24 project bearing. An oil tube 14 cen-.

outside of the casing extension 2 and have intermeshing gear segments 26 thereon, and a larger gear segment 27 on one of sa1d stems 33 meshes with a worm or screw 28 on an operating shaft :29. The stem 30 of valve 23 pro]ects through pipe 22, and has a segment 31 fixed thereon which meshes with a second worm or screw 32 on shaft 29 so that when said shaft 29 is turned it will compel all of the throttle valves to operate to ether.

he operation is as follows: Air under the desired pressure enters inlet 21 and in its assage through casing 1 causes the propeler 20 and tube 14 to revolve. The oil flows through tube 14 and by reason of the centrifugal action, is thrown outward by the nozzle 18 in a fine spray against the spreader 17 and commingles with the air at the outer end of the spreader and insures a perfect combustion. In order that there may be a perfectly proportioned mixture of oil and air, it is necessary to provide some means for controlling the air, and I have illustrated a means for this purpose the operation of which is as follows:

Air enters at inlet 21 and flows through the casing to nozzle 6 and is discharged around the spreader 17. In its passage through the casing 1, it causes the ropeller 20 and oil tube 14 to revolve thus giving the necessary centrifugal action to the oil nozzle to spray or break up the globules of oil. The flow of air is controlled by the throttle valves 24 and 23 which operate in unison through the medium of the gearing above described. In other words, when the valves 24 are .moved toward closed position, the valve 23 is moved toward full open position and vice-versa, so that while the movement of the throttles is always in unison, it is also exactly opposite, hence when throttles 24 are fully open, throttle 23 is closed. The operator can thus adjust the supply of air to the burner nozzle by a fine adjustment so as to insure the best results.

It will be understood, of course, that the parts may be so arranged as to have the nozzle or atomizing tube rotate directly under the influence of the air stream and in turn rotate the oil tube.

It will be noted that the air exhaust is located intermediate the propeller 20 and the nozzle or atomizing tube 18, so that while the air is exhausted at a point in front of the atomizing tube, so as to regulate the fuel charge, the shaft andconsequently the atomizing tube or nozzle are propelled by the full current of air that enters the casing so that the atomizing cup is maintained at the same velocity irres ctive of the amount of air which reaches t e burner end.

It will thus be seen that there is provided a device in which the several objects of this invention are achieved and which is well adapted to meet the conditions of practical use.

As various possible embodiments might be made of the above invention, and as various changes might be made in the embodiment above set forth, it is to be'understood that all matter herein set forth or shown in the accompanying drawings is to be interpreted as illustrative and not in a limiting sense.

Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. An oil burner comprising a casing having an air passage, an oil supply tube revolubly mounted in the casing, a propeller on the tube in the casing, said casing having an air inlet to and an air exhaust from said passage at opposite sides of the propeller, and air throttling means inthecasing between the exhaust and the outlet ends-of the burner.

2. An oil burner comprising acasing, an oil tube in the casing, a propeller on the tube in the casing, said casing having-an air inlet and an air exhaust at opposite sides of the propeller, and air throttling means in the casing and exhaust, operating in unison.

3. An oil burner comprising a casing for the passage of air, an oil tube in the casing revolved by the passage of air, means for exhausting the air from the casing before it reaches the mixing end of the burner, throttle valves in the casing and in the exhaust, and manually operated gearing adapted to operate said valves in unison.

4- An oil burner, comprising a casing, an oil tube in the casing, a propeller on the tube in the casing, said casing having an air inlet and an air exhaust at opposite sides of the propeller, throttle valves in the casing and in the exhaust, and manually operated gearing compelling said valves to operate in unison.

5. An oil burner comprising a casing having an air passage, an oil supply tube revolubly mounted in the passage, a propeller on the tube in the casing, said casing having an air inlet and exhaust ports at opposite sides of the propeller, oppositely tapered ends on the tube and casing, and a nozzle rigidly on the end of the oil tube having radial orifices therein discharging against the tapering end or spreader of the oil tube.

6 An oil burner, comprising a casing, an oil tube having rotary mounting in the casing, a propeller on the tube in the casing, said casing having air inlet and exhaust ports at opposite sides of the ropeller, oppositelv tapered ends on the to e and casing, a nozzle on the end of the oil tube having radial orifices therein discharging against the tapering end or spreader of the oil tube, and throttle valves in the casing and or haust.

7. An oil burner comprising a cylindrical casing, an extension removably secured to one end of the casing, said extension having a recessed partition at one end thereof, a tapering air nozzle screwedvonto the other end of the extension, anti-friction hearings in the rear end of the casing and in the partition, an oil tube mounted to turn in said bearings, a propeller on the tube between the bearings, said casing having air inlet and exhaust ports therein at opposite sides of the propeller, means controlling the flow of air through the casing and from the exhaust, and a spray nozzle on the outlet end of the oil tube.

8. An oil burner comprising a cylindrical casing, an extension relnovably secured to one end ofthe casing, said extension having a recessed partition at one end thereof, a

2" tapering air nozzle screwed onto the other end of the extension, anti-friction hearings in the rear end of the casing and in the partition, an oil supply tube having a propeller mounted to revolve on the bearing, said casing having air inlet and exhaust ports therein at opposite sides of the propeller, means controlling the flow of air through the casing and from the exhaust port, and aspray nozzle on the outlet end of the oil tube, said nozzle including a spreader secured to the outlet end of the tube.

9. An oil burner comprising a casing, a rotaryoil tube in the casing, means for admitting air to the casing and exhaustin the same therefrom, the flow of air throng the casing being elfective to rotate said tube, and air throttling means in the casing and exhaust.

In testimony whereof I affix my signature.

FRANK RIX. 

